Cromwell is anunincorporated community inPierce County, in theU.S. state ofWashington.[1]
A post office called Cromwell was established in 1903, and remained in operation until 1931.[2] The community was named after J. B. Cromwell, a postal official.[3]
47°16′27″N122°37′20″W / 47.27417°N 122.62222°W /47.27417; -122.62222
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